Developer postOriginal post (opens in a new tab)

Bye Sony Creative Software, hello MAGIX!

With this update MAGIX is completing the transition phase following the official acquisition of the majority of Sony Creative Software products.

Important note:

Due to existing agreements with our Russian and Japanese distributors, we no longer offer full Russian and Japanese language versions.

For this reason, customers who already have installed a version of the program from Sony Creative Software, won't get the update automatically.
The following post describes how you can install the update manually: Steam Forum

The previous version can always be restored after installing the update.
This is described in this post: Steam Forum